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Discovered:
- June 13, 2002
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Updated:
- February 13, 2007 11:39:18 AM
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Also Known As:
- W32/Perrun-A, PE_PERRUN.A, Win32.Perrun, W32/Perrun, Perrun, W32/Perrun.A
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Type:
- Virus
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Systems Affected:
- Windows 2000, Windows 3.x, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP
W32.Perrun is a virus that appends itself to .jpeg or .txt files. The malicious content of files that it alters will not spread to other computers. Indications of infection are that .jpg or .txt files will have increased in size by approximately 11KB, and the presence of the file Extrk.exe or Textrk.exe.
The original data will not successfully extract from .jpeg files if the file C:\Windows\System\Shimgvw.dll does not exist on an infected computer.
The original data will not successfully extract from .txt files if the file C:\Windows\Notepad.exe does not exist on an infected computer.
Antivirus Protection Dates
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Initial Rapid Release version June 13, 2002
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Latest Rapid Release version September 28, 2010 revision 054
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Initial Daily Certified version October 31, 2007 revision 003
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Latest Daily Certified version September 28, 2010 revision 036
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Initial Weekly Certified release date June 19, 2002
Click for a more detailed description of Rapid Release and Daily Certified virus definitions.
Threat Assessment
Wild
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Wild Level: Low
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Number of Infections: 0 - 49
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Number of Sites: 0 - 2
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Geographical Distribution: Low
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Threat Containment: Easy
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Removal: Easy
Writeup By: Douglas Knowles
